Desk and seat structure



DESK AND SEAT STRUCTURE Filed Aug; 2l. 1922 2 Sheets-Sheet 1 Aug. 28',923.

G. H. HAMILTON ET Al.

DESK AND SEAT sTRUTURE Filed Auz.-21.

1922 2A Sheets-Sheet 2 1 Geary@ Matth 57 Patented Aug 28, i923.,

narrare stares GEORGE Ii. HAMILTON ANIifMATTIrYs NUBEEG, or CRANERAPIDS, MICHIGAN, AssIGNoEs TOAMERICAN SEATING COMPANY, or GRAND RAPIDS,MICHIGAN, A

CORPORATIDN OF INEV JERSEY.

'DESK ANI) SEAT STRUCTURE.

.ApplicationY filed August'Zl, 1922. vSerial No. 583,362.

the county of 4Kent and State-of Michigan,

have invented new and useful Improvements in DeskV and Seat Structures,of which the following is a specification.v o i The present inventionrelates to desk and '.10 seat structures; andits object is to providesuch a structure having improved means for' adjusting the desk or seatportion thereof to a desired height. a f l o This general Object and anyother 'more .15 specific objects hereinafter appearing are attained by,and the invention'v finds prefer-V able embodimentin, the structureherei'n after particularly described in they body of this specificationandillustrated by the `accompanying drawings, in which Figure 1 is anend View O a deskand seatstructure; 1

Figure 2 is a sectional :View of a portion thereof taken on anapproximatelyvertical plane corresponding to line 2 2 of Figure 1;Figure 3 is asectional view (enlarged) of a portion of the same taken ona plane corre sponding .to line 3 3 ofvFigure 4E;

Figure 4 is a sectional; view of the same taken on planes correspondingto line 4 4 of Figure 3;

Figure 5 is a sectional vie taken fon planes corresponding toline 5 5 ofFigure 3; y

Figure 6 is a fragmentary View of a-retaining piece showing a means forholding the same in position; Figure Y7' is a .tace View of a rack; and

Figure 8 is a longitudinal sectional view of the same taken on line 8 8of Figure A7. Y

In the embodiment ofthe invention chosen for illustration by thedrawingsV and for detailed description in the body ofV thisspecification, a desk and seat structure-such 'as y' are employed inschool rooms is shown, having a pair of ends formed preferably of sheetmetal and connected by the seat 1, seatback 2 and desk-top 3. Each ofthe structures said ends comprises a supporting member preferably madeof a metallic sheet bent to form parallelly disposed sides 4f, 4 and anintermediate guide 5 having a rack 6 formed by the uniformlyspaced-apart apertures 7;V each of the structures said ends of the same:

Y of the rack.

comprises also a supported member or'members thD seat and seat-backsustaining memearriar 'or-reca. A'

ber andthe desk-top sustaining member V9. y These supportedmembers `Sand9 are 'severmovable in an approximately lvertical direction ontheirguidos 'respectively, and each preferably comprises spaced .sides10 having guided Aportions 11 movable` along i ktheopposite sidesoftheguide V'aiid having alsoslots 12 elongated transversely to the supportedmembers'V direction .of guided movement. A `gear lbetween said sides 10meshes in its operative position with vthe rack 6,',the teeth of Vthisgear entering the apertures ,7 of thev rack. This gear has' a hubportion '14 rotatable and transaxially movable inthe slots 12` androtatable in rotary bearings v15 in retaining pieces 16,detachablysecured to the supported member in suchpositionl thatthe gear is held inopi erative position' (inmesh rwith the rack) by the rotary bearings 15.These retaining pieces `are held insaidpositioniby suitable rmeans asby'their flanges Y17 engaging theA guided portionsV 11 Yrespectively otthe supported member. These retaining pieces may beheld in said positionalso by their' lugs 18 removably seated Ain'-- keepers 10 of thesupported member.

t'will be understoodthat .in assembling 9 in the sides vthe parts thehub portions 14: are-inserted into the slots 12 ofthetwo sides '10, andthe guides 5 into the l guidedV portions 11, the `hub I" le-oi" thegearl being moved to the left hand side of the slots 12 (see Figure 8).The

`gear may nowibe turned sufficiently to cause some of itsfteeth toregister with apertures 7 Thev gear being now moved transaxially towardthe right hand (see Figure 3),:these teeth will be brought into meshwith the rack, in which meshing they will be secured by .assembling the`'retaining pieces 176 held in place by the bolt '22 ywhich also servesto clampv the parts in iXedrela-' tion as hereinafter l explained.

The supported member may be raised and lowered On the supportingmemberby turning the gear when in its Operative :orvmeshfr ing position(shown in the drawings) by means of a square rod 20 ,thrust through thesquared central openings 21 in the gears;

and when raised or lowered to desired position, the supported membermaybe clamped in such position by the threaded bolt 22 vloo passing throughsuitable openings in the re.- taining .pieces and through registeringopenings in the sides of the supported .member, said'bolt having a nut23, and also head portionl 24: whereby it is held againstI .turning.This same bolt in the construction shown also serves to detachablvsecure the retaining pieces in position.

It will be seen that the connections between the supporting memberandthe supported members 8 and 9 are the same and comprise 'rlile parts.

y clamping said members together.-

n Figures 7 and 8 a modified Vform of the racl; is sho-wn. in these-viewsythe metal is slit at .30 and 3l and the upper and lowerportions'ofthe metal between such slits is severed in the middle7whereupon the tongues 32, 33 .thus formed are bent inwardly, thusproviding a more extended surface on which the .teeth ot the gear orpinion 13 bear in .meshing in .the apertures 71.

The invention being intended to be pointed .out in the claims, is.l notto be limited to or by ,details ot vconstruction .of the particularembodiment .thereof illustrated by the draw.- ings .orhereiiibe'foreshown or described.

lvV hat is ,claimed is l. In a structure v.ofthe character .de-

scribed; a supporting member having a guideand a rack; ajsupportedmember. movable .on the guide and having slot elongated transitersely'.to ,the supported inembers direction ot'l movement; a gear meshing inits .operative position with the rack and having a hub portion rotatableand tran-saxially' movable in the slot; a retaining piece having abearing wherein the hub por-tion rotates; said piece being Adetach-VVablysecured to .the supported member inra 'portion Viotates,'said piecebeing detachably secured to the supported member in a posi,- tion inwhich the gear is heldin its operative` position; means for lsecuringthe retaining pieee in its said position and for 3. Inv a lstructure ofAthe .Character dei senese scribed ya supporting member having a guideand a rack; a supported member comprising spaced sides having guidedportions movable along ,opposite .sides .of the guide.

and having Valso slots .elongated transversely to the supported members,direction of movement; a gear between said sides meshing in itsloperative position with the rack and having a hub portion rotatable andtransaxially movable in the slots; alretaining piece having a bearingwherein the hub portion rotates, said piece being detachably secured tothe supported member in a position in which .the gear is held in itsoperan tive position; vmeans for clampingsaid sides andthe supportingmember together.`

4.. Ina structure of the character de'- Y scribed; ya supportingmeinberhavinga guide up and a rack; a supported member comprising spacedsides respectively having guided portions movable along opposite sides.of the guide and having Valso slots, elongated transversely to lthesupported members :di-'- rection of movement; 'a' gear betweenY said-Ysides meshing in its operative VpositionvvithY the rack Yandhaving ahu'bi portion. rotatable and transaXi-ally movablein theslots;

Vretaining pieces having bearings wherein the hub Yportion rotates, saidpieces 'being-V .detaehably secured to the supported member in aposition in which the gear is held in its operative position, and saidpieces having flanges engaging said-sides guided portions f; A meansVlfor clamping. ,the.supporting?inem .V

ber, thesaid 'pieces Vand the supported mem.-V

bei-s saidsides together.'V A

5. ln a structure of the character. described;V a supportingr'imember oametallic sheet bent to form parallelly disposed sides and anintermediate guide Vhaving spaced. apertures forming aracl; a supportedmember movable on theV guide and .hav-v ing a slot elongatedtra-nsversel5T to the supported members direction of moveinen-tgja gearmeshing in its operative position with the rack and having a hub portionrotatable Land transaxially movable in the slot;v a retaining piecehaving a bearing wherein the hub portion rotates, said piece beingdetachably secured to the supported member.

in a position in which'the gear is heldin its operative position; meansfor elampingthe said members togethenjv Y In testimony 'whereof We haveAhereunto set our hands .at Grand Rapids, Michigan, this 12th day ofAugust, `1922.

- suenen H. naMiiiroN.

iiiaiTHYs mienne.

